TS-Pattern is over 3K ⭐️ on GitHub now! This is nuts 🤯
I started TS-Pattern as an experiment to see how far the type system of #TypeScript could go.
Here are 4 of my favorites features I've built into TS-Pattern! 🧵👇
I started TS-Pattern as an experiment to see how far the type system of #TypeScript could go.
Here are 4 of my favorites features I've built into TS-Pattern! 🧵👇
First, keep in mind that Pattern Matching is usually a language feature.
Trying to make a library as good as native support is challenging! A key aspect of this is type inference.
The features I'll talk about have little to no runtime. It's only types!
Trying to make a library as good as native support is challenging! A key aspect of this is type inference.
The features I'll talk about have little to no runtime. It's only types!
Feature nº1: Type narrowing 🔎
TS-Pattern infers a precise type for your input based on the pattern you provide:
TS-Pattern infers a precise type for your input based on the pattern you provide:
Feature nº2: Exhaustiveness checking ✅
If your list of patterns doesn’t cover all edge cases of your input data-structure, TS-Pattern is able to tell you what cases are missing to make your branching exhaustive:
If your list of patterns doesn’t cover all edge cases of your input data-structure, TS-Pattern is able to tell you what cases are missing to make your branching exhaustive:
Feature nº3: Select ✂️
The `P.select` pattern let you extract a part of your input and TS-Pattern will inject it in your handler with the right type!
The `P.select` pattern let you extract a part of your input and TS-Pattern will inject it in your handler with the right type!
Feature nº4: Matching on unknown inputs 🤔
TS-Pattern can help you validate the shape of unknown inputs. You can infer a type from a pattern and use isMatching to narrow your input down in an `if` statement:
TS-Pattern can help you validate the shape of unknown inputs. You can infer a type from a pattern and use isMatching to narrow your input down in an `if` statement:
That's it for now!
Check out the repo 👉 github.com/gvergnaud/ts-p…
If you want to learn how I do this, stay tuned! I'm working on a series ob blogposts on advanced #TypeScript patterns... 🤫
Check out the repo 👉 github.com/gvergnaud/ts-p…
If you want to learn how I do this, stay tuned! I'm working on a series ob blogposts on advanced #TypeScript patterns... 🤫
Well, that was fast 🔥
TS-Pattern is over 4k stars now ✨🎉
TS-Pattern is over 4k stars now ✨🎉
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